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  #1  
Old 08-18-2013, 10:11 AM
jay.pearlman jay.pearlman is offline
 
Join Date: Jan 2010
Location: Port Angeles WA
Posts: 244
Default Screws for wingtips

I am mounting the wingtips. The plans say either screws (removable) or rivets. I need to make it removable because antennae and lights are mounted in the tip. The choice of screws seems to be 6-32 or 8-32. Which size screws have you used? Why the choice?
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  #2  
Old 08-18-2013, 10:16 AM
Fred.Stucklen's Avatar
Fred.Stucklen Fred.Stucklen is offline
 
Join Date: Oct 2006
Location: Brooksville, FL
Posts: 292
Default Screws for wingtips

I used 6-32 srews in the provided hole locations. My wingtips are also gas tanks (9.5 gals each). I've not seen any indications of tip movement.

Quote:
Originally Posted by jay.pearlman View Post
I am mounting the wingtips. The plans say either screws (removable) or rivets. I need to make it removable because antennae and lights are mounted in the tip. The choice of screws seems to be 6-32 or 8-32. Which size screws have you used? Why the choice?
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  #3  
Old 08-18-2013, 10:21 AM
aerhed aerhed is offline
 
Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,566
Default

Eights are tough because they're so near the edge you get a wavy skin. Bigger heads are hard to get flush also. Some guys have used fours, but I hate fours because they strip or snap so easily. So.....sixes, I guess.
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  #4  
Old 08-18-2013, 11:23 AM
Stoo Stoo is offline
 
Join Date: May 2006
Location: LL10, Naperville, IL.
Posts: 47
Default

I used the Cleaveland kit with 4-40 screws.


http://www.cleavelandtool.com/Stainl...ctinfo/WHS220/

Stewart Willoughby
6, finishing
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  #5  
Old 08-18-2013, 11:34 AM
wjnmd wjnmd is offline
 
Join Date: Mar 2006
Location: Seminole, FL
Posts: 263
Default Cleaveland wingtip kit

I used the Cleaveland wingtip kit but I also used Click-Bond nutplates that are cemented to the wingtip with a two part epoxy. Easy to install and easy to remove if necessary.
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  #6  
Old 08-18-2013, 12:02 PM
instructor_bill instructor_bill is offline
 
Join Date: Jul 2009
Location: Petaluma, CA
Posts: 232
Default

Quote:
Originally Posted by Stoo View Post
I used the Cleaveland kit with 4-40 screws.


http://www.cleavelandtool.com/Stainl...ctinfo/WHS220/

Stewart Willoughby
6, finishing
then also go to microfasteners.com and buy #4 torx screws and you have a really nice, low stripping solution.

I found that the screws that came with the cleveland tool kit stripped very easily. I tried everything including flattening the tip on a high quality new screw driver tip to get a deeper bite in the screw head-- still stripped.

torx is the way to go.
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  #7  
Old 08-18-2013, 12:02 PM
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Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 4,375
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I agree, #6 are the best here.
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  #8  
Old 08-18-2013, 12:41 PM
RV7Guy's Avatar
RV7Guy RV7Guy is offline
 
Join Date: Jan 2005
Location: Chandler, AZ
Posts: 2,782
Default Don't use 4-40's!!!

I would definitely not use 4-40's they are simply too small and the screw heads are easy to strip out. I did one wing tip with these and removed and replaced with 6-32. Better grip and MUCH cheaper. I can't recall any other 4-40's in the construction.

Regarding Torx, I don't get the fascination with them. You gain no advantage over Phillips. Now you have to carry a few extra Torx and the proper wrench.

Remember to use the back up metal strips when you attach the nut plates to the glass.
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  #9  
Old 08-18-2013, 12:51 PM
Joe Joe is offline
 
Join Date: Oct 2005
Location: Independence, OR
Posts: 318
Default 6-32 for me ...

I hate to sound like a clueless "me too-er" but I like many others, I used 6-32's.

It was easy to make the decision: weigh a bag of seventy-eight (!) 6-32 screws and nutplates and weigh a bag of 8-32s <g>.

I've had no issues with the smaller screw heads using proper techniques (Boelube on initial installation, good #2 Phillips bit).

--
Joe
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  #10  
Old 08-18-2013, 01:38 PM
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scard scard is offline
 
Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 2,689
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Our current airplane has 4-40 torx. I'm not going to do that again. Next one has 6-32 phillips.
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